Lock slider



atente'd May 23, 1944 UNlTED STATES PATENT 14 Claims.

This invention relates to separable fasteners employing stringers with aslider movable on the stringere to couple and uncouple the same. Moreparticularlmthe invention relates to iasteners of this kind having.means on the links oi the stringers and on the slider to automaticallylock the slider against opening movement on the' stringers, when thestringers. are strained laterally tending to separate the same. novelfeatures of the invention will be best understood from the followingldescription when taken together with the accompanying drawing, in whichcertain embodiments of the invention are disclosed, and in which theseparate parts are designated by suitable reference characters in eachof the views; and in which:

Fig. 1 is a sectional detailed view of a pair of stringere showing theslider thereon, and illustrating our invention.

Fig. 2 is a view similar to Fig. 1 showing the slider in lockedposition.

Fig. 3 is a section on the line 3 3 of Fig. 1.

Fig. 4 is a diagrammatic view showing one link preparatory to engagementwith a lock pin.

Fig. 5 is a view similar to Fig. 4 showing the pin in a groove orchannel in the link.

Fig. 6 is a view similar to Figs. 4 and 5 showing the next position ofthe link.

Fig. 7 is a view similar to Fig. 6 showing'the link engaging the stoppin in checking movement oi' the slider.

Fig. 8 is a partial section on the line 8 8 of Fig. 7.

ln separable fasteners many types and kinds oi' locks have been providedto check or retain a slider against movement on the stringers. Some ofthese locks have been provided between the slider and end stops,commonly referred to as top stops, whereas, in other instances movablestringers, that is to say, movement is checked if the stringers arestrained laterally tending to separate the same. However, normalmovement Theof the slider along the stringers to couple uncouple same isnot interferred with.

In the accompanying drawing, the invention` v is shown in combinationwith a link of specific structure but this is simply to illustrate oneone will apply to all. In this connection, note Fig. 4 which shows onescoop on a large scale.

The outer coupling ends of the scoop has a V shape projection i3 onopposed surfaces there-` of inwardly of which are V shaped notches orrecesses it.. the latter receiving the projections I3 of the scoops oi'an opposed Stringer as clearly indicated in Figs. 1 and 2.

Extending vertically through the end`of the 1 scoop having theprojections i3 is an apertureV or elements l central of the recesseslil. This construction keys the links or scoops against transverseseparation. Links or scoops of this general structure are defined asdouble acting scoops, in that they may be coupled and uncoupled withsliders arranged in any position on the stringere, thus adapting thestringers for the use'of two sliders where such uses arev de.

sirable.

With the type of link or scoop described we provide on opposite sidesurfaces thereof channels or grooves Il ,bounded at the inner mountingend portion of the scoop by straight walls it and at the outer couplingend by beveled walls i9 which flare outwardly in the direction of thenarrow single channelled end i@ of a slider 2l.

The slider il is of more or less conventional and.

pins 26 and 21 into the channels is suicient to pass freely through therecesses I1 in normal operations of the slider, while being sumcientiylong to engage the projecting members 28 formed at the outer coupledends of the scoops by the recesses I1, as clearly illustrated in Figure8 of the drawing. It will be noted upon a consideration of Figures l and2 that the pins 28 and 21 are staggered in order to substantiallysimultaneously engage links on both stringers.

In normal movement of the slider along the stringers the pins 26 and 21will move freely 1 through the recesses or channels I1 on the sidesurfaces of the links or scoops. However, whenthe stringer tapes arestrained laterally as indicated in Fig. 2. tending to separate thestringers. the slider will become automatically locked on the vstringersin substantialLv the following manner.

In Figs. 4 to 6 inclusive, four stages of the passage of the completelock pin through the channels ofthe links or scoops are shown. In Figure4 it will be assumed that the lock pin 21 is just below one of thelinks. As the slider moves in the direction of this linkthe pin entersthe channel I1 and rides over the surface I9, particularly if at thistime slight lateral strain prevails on the stringer. This position ofthe parts is shown in Fig. 5. As progress of the slider continues, thepin 21 passes out of the channel I1 as indicated in Fig. 6 of thedrawing, and if a lateral strain is then applied t'o the stringer, thebeveled wall 29 ofthe projection 28 will be moved into engagement withthe pin 21 as seen in Fig. 'l of the drawing in which position theslider will be locked against opening movement on the stringers. I

assassi is strained laterally, whereby opening movement of the sliderdue to the lateral strain is checked.

2. A separable fastener comprising stringers having scoops alongadjacent edges thereof adapted to be coupled and uncoupled by a slidermovable along the stringers. the slider comprising a channelled bodywithdiverging channels at one end thereof, pin members on the sliderprojecting into the diverging channels thereof, each of the scoopshaving arecess therein to provide normal free passage of the scoopsthrough the channels of said slider, said recesses being positioned onthe scoop to cause a part ofthe scoop to engage a pin member when thestringer is strained laterally, whereby opening movement of the sliderdue to the lateral strain is checked. and one boundary wall of therecess in each scoop beinzA angular to the other boundary wall of saidrecess.

3. In separable fasteners employing'stringers and a slider movable alongthe stringer to couple andv uncouple the same, each stringer havingscoops spaced longitudinally of one end portion thereof forinter-locking engagement with the When the strain is applied to thestringers,- should the lock pins 2B, 21 b within the channels I1 of twolinks', these pins will be moved into engagement with the next adjacentlinks in blocking or checking further opening movement of the slider, orin other words in checking further separation of the stringers. It isalso pointed out that in normal movement of the slider along thestringers to separate the same, the pins 2O and 21 will move freelythrough the channels i1, and may in some instances be guided by thebeveled walls 29. The beveling of the walls I 9 is to assist the closingmovement oi' the@ slider, particularly if slight strains should prevailon the stringers, for example, in the rpresence of a relatively tightgarment. With some types oi. links or scoops beveled walls as of 29would not be needed, but some form of projection would be provided onthe coupling end of the link which could engage the pin to lock theslider, and any arrangement of slots or channels r:an be provided on thelinks for free passage of he pins. I

Having fully described our invention, what we claim as new and desire tosecure by Letters Patent is:

l. A separable fastener comprising stringers having scoops alongadjacent edges thereof adapted to be coupled and uncoupled by a slidermovable along the stringers, the slider comprising a channelled bodywith diverglng channels at one end thereof, pin members on the sliderprojecting into the diverging channels thereof, each of the scoopshaving a recess therein to -provide normal free passage of the scoopsthrough the channels of saidl slider, said recesses being positioned onthev scoop to cause a part of the stringer scoops to retain the slideragainst movement on the stringers when the stringers are strained in amanner tending. to separate the same, said means comprising a pinelement blocking passage of the stringer scoops through the sliderchannel, and the stringer scoops having recesses to receive said pin innormal coupling and uncoupling of thestrlngerl by said slider.

4. In separable fasteners employing stringers and a channelled slidermovable along the stringers to couple and uncouple the same, the sliderhaving a blocking element projecting into the channel thereof. a pair ofstringers, each stringer having scoops spaced longitudinally of one edgethereof, said scoops having coupling elements retaining coupledstringers against separation from each other, and at least one sidesurface of each scoop of one stringer having a channel extending acrossthe scoop and longitudinally of the stringer to clear the blockingelement on the slider in normal coupling and uncoupling of thestringers.

5. In separable fasteners employing stringers and a channeled slidermovable along the stringers to couple and uncouple the same, the sliderhaving a blocking element projecting into the channel thereof, a pair ofstringers, each stringer having scoops spaced longitudinally-of one edgethereof, said scoops having coupling elements retaining coupledstringers against separation from each other, and atleast one sidesurface of each scoop of one Stringer having a channel extending acrossthe scoop and longitudinally V of the stringer to clear the blockingelement on Ascoop to engage a pin member .when the string 75 the sliderin normal coupling and uncoupling of the stringers, and one boundarywall of the channel of said scoops being substantially parallel to thelongitudinal line of the stringer and the opposed boundary wallextending angularly to said first named wall.

6. The combination with separable fasteners employing stringers. scoopsthereon and a slider movable along the stringers to couple and uncouplethe same, of a rigid blocking element on the slider engaging the scoopsof the stringers for automatically checking movement of lthe stringersthrough theslider when the stringers are strained in a direction tendingto separate the saine, and said stringer scoops having recessesproviding free passage of the blocking element of the slider in thecoupling and unoupling of said stringers.

7. The combination with separable fasteners employing stringers withscoops thereon movable through diverging channels of a slider incoupling and uncoupling the stringers, of a blocking element projectingsubstantially centrally into one channel of said slider to engage thescoops oi one Stringer in checking movement of the slider in onedirection of the stringers, the scoops of said stringer having recessmeans providing free normal passage of the scoops past said blockingelement.

d. n slider for separable fasteners, said slider comprising a bodyhaving wide and narrow ends defined by spaced walls joined at the wideend by a connecting web dividing said body into diverging channels atsaid wide end and convergn ing toone channel at the narrow end of saidbody, said channels being partially formed by inturned flanges at sideedges of said walls, and a blocking element extending into eachdiverging channel intermediate the web and said anges and nearer the webthan said flanges.

9. A slider for separable fasteners, said slider comprising a bodyhaving wide and narrow ends defined by spaced walls joined at the wideend by a connecting web dividing said body into diverging channels atsaid wide end and converging to one channel at the narrow end of saidbody,

said channels being partially formed by inturned flanges at side edgesof said walls, a blocking element extending into each diverging channelintermediate the web and said flanges and nearer the web than saidflanges, and the blocking element-of one channel being offsetlongitudinally of said slider body with respectto the blocking elementof the other channel.

10. In separable fasteners comprising stringere having scoops alongadjacent edges thereof and a slider movable along the stringers, saidslider comprising spaced walls, partly defining a pair of divergingchannels, the locking improvement which comprises a blocking elementmounted within at least one of said channels and adapted toengage scoopsto prevent movement of the slider when the stringers are strained in amanner tending .to separate the same, each of the scoops engaging saidblocking element having recess means providing free normal passage ofsaid blocking element.

ll.` In separable fasteners comprising stringers having scoops alongadjacent edges thereof and a slider movable along the stringers, saidslider `comprising spaced walls, partly defining a pair of divergingchannels. the locking improvement which comprises a blocking elementmounted within at least'one of said channels and adapted to engagescoops to prevent movement of the slider when the stringers are strainedin a manner tending to separate the same, each of the scoopsA engagingsaid blocking element having recess means providing free normal passageof said blocking element, said recess comprising a channel defined bywalls at least one of which has a conguration providing a cammedrelation to said blocking element.

l2. .il scoop for separable fasteners of the vtype having scoops alongadjacent edges thereof and a slider movable along the stringers, saidslider comprising spaced walls partly defining a pair of channels, saidscoop having opposed surfaces adapted for sliding movement in relationto said slider walls and other opposed surfaces having similar male andfemale coupling portions, at least one ofA the first named surfaceshaving a channel therein adapted for thek free passage therethrough of ablocking element mounted within a channel of said slider.

13. l scoop for separable fasteners of the type having scoops alongadjacent edges thereof and a slider movable along the stringers, saidslider comprising spaced walls partly dedning a pair of channels, saidscoop having opposed surfaces adapted for sliding movement in relationto said slider walls, at least one of said surfaces having a channeltherein adapted for the free passage therethrough of a blocking elementmounted within a channel of said slider.

la. A scoop for separable fasteners of the type having scoops alongadjacent edges thereof and a slider movable along the stringers, saidslider comprising spaced walls partly denning a pair of channels, saidscoop having opposed surfaces adapted for sliding movement in relationto said slider walls and other opposed surfaces having couplingportions, at least one of the rst named surfaces having a channelthereinv adapted for the free normal passage therethrough of a blockingelement mounted within a channel of said slider, apart of at least oneof the second named surfaces being adapted for engagement with saidblocking element to check movement of the slider.

DAVIS MARINSKY. LOUIS l-l. MORIN.

